Name one built in the last 15 years? My guess if there is one, it is a totally cheap POS. There used to be stage/light/rig controllers that did it. But, those don’t do it anymore either … for the same reason we are complaining. The MIDI indicator has for quite some time been an activity indicator, not a “HI I am here, Are you there? Yes, I am here, are you there?” That implementation has been dead a long time.